飘雪花效果

特效说明：

把下列代码加到网页的<Body></Body>标签之间

<html>
<head>
<title>:::飘雪花效果:::网页特效代码:::IK8网络家园http://www.itdodo.net</title>
</head>
<BODY bgcolor="#000000">
<SCRIPT language=JavaScript1.2>
   var snowsrc="img/snow.gif"
   var no = 10;
   var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
   var ie4up = (document.all) ? 1 : 0;
   var dx, xp, yp;    // coordinate and position variables
   var am, stx, sty;  // amplitude and step variables
   var i, doc_width = 800, doc_height =600;
   if (ns4up) {
     doc_width = self.innerWidth;
     doc_height = self.innerHeight;
   } else if (ie4up) {
     doc_width = document.body.clientWidth;
     doc_height = document.body.clientHeight;
   }
 
   dx = new Array();
   xp = new Array();
   yp = new Array();
   am = new Array();
   stx = new Array();
   sty = new Array();
   for (i = 0; i < no; ++ i) {  
     dx[i] = 0;                        // set coordinate variables
     xp[i] = Math.random()*(doc_width-50);  // set position variables
     yp[i] = Math.random()*doc_height;
     am[i] = Math.random()*20;         // set amplitude variables
     stx[i] = 0.02 + Math.random()/10; // set step variables
     sty[i] = 0.7 + Math.random();     // set step variables
     if (ns4up) {                      // set layers
       if (i == 0) {
         document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><a href=\"http://www.itdodo.net/\"><img src='"+snowsrc+"' border=\"0\"></a></layer>");
       } else {
         document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+snowsrc+"' border=\"0\"></layer>");
       }
     } else if (ie4up) {
       if (i == 0) {
         document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://www.itdodo.net\"><img src='"+snowsrc+"' border=\"0\"></a></div>");
       } else {
         document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"></div>");
       }
     }
   }
   function snowNS() {  // Netscape main animation function
     for (i = 0; i < no; ++ i) {  // iterate for every dot
       yp[i] += sty[i];
       if (yp[i] > doc_height-50) {
         xp[i] = Math.random()*(doc_width-am[i]-30);
         yp[i] = 0;
         stx[i] = 0.02 + Math.random()/10;
         sty[i] = 0.7 + Math.random();
         doc_width = self.innerWidth;
         doc_height = self.innerHeight;
       }
       dx[i] += stx[i];
       document.layers["dot"+i].top = yp[i];
       document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
     }
     setTimeout("snowNS()", 10);
   }
 
   function snowIE() {  // IE main animation function
     for (i = 0; i < no; ++ i) {  // iterate for every dot
       yp[i] += sty[i];
       if (yp[i] > doc_height-50) {
         xp[i] = Math.random()*(doc_width-am[i]-30);
         yp[i] = 0;
         stx[i] = 0.02 + Math.random()/10;
         sty[i] = 0.7 + Math.random();
         doc_width = document.body.clientWidth;
         doc_height = document.body.clientHeight;
       }
       dx[i] += stx[i];
       document.all["dot"+i].style.pixelTop = yp[i];
       document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
     }
     setTimeout("snowIE()", 10);
   }
 
   if (ns4up) {
     snowNS();
   } else if (ie4up) {
     snowIE();
   }
  </SCRIPT>
      <table border="0" width="100%" cellpadding="0">
        <tr>
          <td width="100%"><font color="#ffffff" size="2"><b>飘雪花效果</b>注意保存这个图片（<img border="1" src="img/snow.gif" width="16" height="17">）</font></td>
        </tr>
        <tr>
          <td width="100%">
</table>
<table width="100%"  border="0" cellpadding="0" cellspacing="0" class="downxian">
  <tr>
    <td></td>
  </tr>
</table><table width="1004"  border="0" cellpadding="0" cellspacing="0" class="downse">
  <tr>
    <td width="420" align="center"><span class="style1">© CopyRight 2002-2005 ZZNJ.com, Inc. All Rights Reserved</span></td>
    <td width="163" align="center"><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="163" height="64">
      <param name="movie" value="../flash/down.swf">
      <param name=quality value=high>
	  <param name="wmode" value="transparent">
      <embed src="../flash/down.swf" quality=high pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="163" height="64"></embed>
    </object></td>
    <td align="center"><span class="style1">Email: skyzznj@126.com</span><div style="display: none"><script src='http://s17.cnzz.com/stat.php?id=153371&web_id=153371&show=pic' language='JavaScript' charset='gb2312'></script></div></td>
  </tr>
</table></body>
</html>